Lubricating system for internal-combustion engines



P 1927' J. N. JOERGER ET AL LUBRICATING S YSTEM FOR INTERNAL COMBUSTION ENGINES Fil ed May s.- 1925 2 Sheets-Sheet 2 VIZZTJVE55ES" 1N VEN TOR JFK/19A TTORNE Y Patented I June 14, 1927.

UNITED STATES JOHN N. JOERGER AND JGHN E. CRAVER, F ATLANTIC CITY,

NEW JERSEY, AS-

SI GNORS TO CRAVEROILER COMPANY AMERICA, 0F PHILADELPHIA, PENN- SYLVA NIA, A CORPORATION PENNSYLVANIA.

LUBRfiIA 'IING SYSTEM FOR INTERNAL-COMBUSTION ENGINES.

Application filed May 8,

Our invention relates to automatic cylinder lubricating systems for internal combustion engines and its objects are to provide 'a lubricating'system which will efficiently lubricate the cylinders of air-internal combus- 'tion engine; which will automatically close against the pressure and effects of back-fire: which, when adjusted for feeding the proper .quantity of oil, will maintain the adjustment under the rapid vibrations of the engine, and

gine connected in accordance with my invention, I

Figure 2 an enlarged central section through a unit of the lubricating system shown in Figure 1,

Figure 3 a plan view of the unit shown in Figure 2,

Figure 4 an enlarged central section through elements of the lubricating systenr shown in Figure 1, and I 3O Figure 5 an enlarged section on line 55 if of Figure 2. a Referring to the drawings, 1 indicates an internal combustion engine, 2 a gas intake manifold, 3 an oil receptacle and 4 a feed line connecting the receptacle with the intake manifold.

The' oil receptacle consists of a base plate 5, a glass cylinder 6 resting on the plate, :1 dome 7 resting on the glass cylinder and a filler tube 8 screwed to the plate and having a ring nut 9 for firmly securing the dome and glass cylinder to the plate. Gaskets are placed between the meeting faces of the parts to' make the receptacle leak-proof. A perforated cap nut 10 covers the upper end of the filler tube. filler tube has perforations 11 which allow the oil to enter the glass cylinder. The up-' per part of the dome 1s packed with felt 12 for absorbing the oil so that the air passing therethrough will become saturated with oil.

An oil feed-controlling valve 13 is con nected with the upper part of the dome and consists of a casing 14 having a seat for a .The lower end of the 1925. Serial No. 28,779.

needle point 15 on a knurled knob 16 threaded in the' casing. A spring strip .17 has one end secured to the valve casing and the other end notched to fit between the teeth of the knurl on knob 16. Strip 1'? is of such strength that it will hold knob 15 against turning under the-rapid vibrations of the engine.

To prevent the pressure caused by back-' fire from forcing oil out of receptacle 3. we provide a nipple 18 on valve casing 14,21 seat 19 therein and a ball 20 adapted. to he forced against the seat by the pressure and to close the line. This ball is normally held adjacent the seat by projections 21 extending from the interior walls of the nipple as shown in Figure 5. pipe 22 is connected with nipple 18. A T 23 is connected with pipe 22 and manifold 2 to provide a branch 24 for connections with the vacuum feed tank 'orother vacuum operated apparatus. An extension tube 25 is (connected with the end of T 23 and extends to the center of the manifold. The free end of the tube has slits lets 28 to form and fall into the manifold,

they will be prevented from flowing down the wall of the manifold to the carburetor. and will drop into the swiftly moving gas in the center of the manifold and be carried upwardly thereby into the cylinders of the engine as shown by the arrows in Figure 4. In operation, the suction stroke of the cylinders causes a vacuum in the manifold which draws'in gas from the carburetor and oil saturated air from receptacle 3. The air passing through the receptacle enters the perforations of cap 10 and passes down through filler tube 8 and out of its perforations 11 into the receptacle. The receptacle being filled with oil, the air bubbles through the oil and then passes through the oil soaked felt 12 and carries with it small globules of oil as it passes through valve 13 and feed pipe 4 into the manifold. As the oil saturated air passes out of tube 25, it is distributed over a wide space within the manifold by slits 2 6, and is carried into the cylinders by thei' irushing gas of the carburetor.

Should a back-fire occur, that is, if the ignition takes .lace before the intake valves are closed, the ack pressure created by the backlire will force ball 20 against seat 19 and close feed line 4: against the back pressure, t us preventing the oil within the receptacle 3 from being, forced out through the perforated cap 10.

Valve 13 is adjusted by turning knob 16 to allow any desired quantity of oil to be fed into the cylinders. Spring strip 17 is of such strength that it will hold knob 16 in position under the rapid vibrations of the engine. The oil accumulated in the feed line is carried to the center of the manifold by tube 25 where it will fall in droplets and be carried by the inrushing gas intonthe cylinders.

It will be seen that with the lubricating system above set forth, any desired quantity of oil may be fed to the cylinders without danger of the controllingvalve getting out of adjustment due to the vibrations of the engine, and flooding the cylinders, and without affecting the carburization of the fuel, and the danger of oil being forced out of its receptacle by the pressure of backfire is entirely avoided.

While we have described our invention as taking a particular form, it will be understood that the various parts may be changed without departing from the spirit thereof, and hence we do not limit ourselves to the precise construction set forth, but consider that we are at liberty to make such changes and alterations as fairly come within the scope of the appended claims.

Having thus described our invention, what we claim as new and desire to secure by Letters Patent is 1. The combination in alubricaling tcm for internal combustion engines, of an intake manifold; an oil receptacle; a feed line connecting the receptacle with the intake manifold; means for admitting air to the oil receptacle; means in the upper portion of the receptacle for holding the oil so that air passing therethrough would become saturated with: oil; a control valve in the feed line connecting the receptacle with the intake manifold; and a check valve also in said feed line, said check valve being arranged to close against back pressure of the engine. Y

2. The combination in a lubricating system for internal combustion engines, of an oil receptacle consisting of a casing; an air tube extending into the'casing and communicating with the' bottom thereof; a fibrous packing in the top of the casing; an intake conduit of an internal combustion engine; a feed line extending from the upper end of the oil reservoir to the conduit; a control valve in said feed line; and a check valve located in the feed line between the control valve and the conduit. In testimony whereof we have signed our names to this specification. 1 JOHN N. JOERGER.

JOHN E. CRAVER. 

